本文整理汇总了C#中DB.Put方法的典型用法代码示例。如果您正苦于以下问题：C# DB.Put方法的具体用法？C# DB.Put怎么用？C# DB.Put使用的例子？那么, 这里精选的方法代码示例或许可以为您提供帮助。您也可以进一步了解该方法所在类DB的用法示例。
在下文中一共展示了DB.Put方法的15个代码示例，这些例子默认根据受欢迎程度排序。您可以为喜欢或者感觉有用的代码点赞，您的评价将有助于系统推荐出更棒的C#代码示例。
示例1: TestIterator
public void TestIterator()
{
var path = CleanTestDB();
using (var db = new DB(path, new Options { CreateIfMissing = true }))
{
db.Put("Tampa", "green");
db.Put("London", "red");
db.Put("New York", "blue");
var expected = new[] { "London", "New York", "Tampa" };
var actual = new List<string>();
using (var iterator = db.CreateIterator(new ReadOptions()))
{
iterator.SeekToFirst();
while (iterator.Valid())
{
var key = iterator.StringKey();
actual.Add(key);
iterator.Next();
}
}
CollectionAssert.AreEqual(expected, actual);
}
}示例2: Main3
static void Main3()
{
var path = CleanTestDB();
using (var db = new DB(new Options {CreateIfMissing = true}, path))
{
db.Put(1, new[] {2, 3}, new WriteOptions());
db.Put(2, new[] {1, 2, 4});
db.Put(3, new[] {1, 3});
db.Put(4, new[] {2, 5, 7});
db.Put(5, new[] {4, 6, 7, 8});
db.Put(6, new[] {5});
db.Put(7, new[] {4, 5, 8});
db.Put(8, new[] {5, 7});
var a = db.Get(1);
var b = db.Get(2);
var c = db.Get(3);
var d = db.Get(4);
var e = db.Get(5);
var f = db.Get(6);
var g = db.Get(7);
var h = db.Get(8);
}
}示例3: LevelDBBlockchain
public LevelDBBlockchain()
{
Slice value;
db = DB.Open(Settings.Default.DataDirectoryPath);
if (db.TryGet(ReadOptions.Default, SliceBuilder.Begin(DataEntryPrefix.CFG_Initialized), out value) && value.ToBoolean())
{
value = db.Get(ReadOptions.Default, SliceBuilder.Begin(DataEntryPrefix.SYS_CurrentBlock));
this.current_block = new UInt256(value.ToArray().Take(32).ToArray());
this.current_height = BitConverter.ToUInt32(value.ToArray(), 32);
}
else
{
WriteBatch batch = new WriteBatch();
ReadOptions options = new ReadOptions { FillCache = false };
using (Iterator it = db.NewIterator(options))
{
for (it.SeekToFirst(); it.Valid(); it.Next())
{
batch.Delete(it.Key());
}
}
batch.Put(SliceBuilder.Begin(DataEntryPrefix.CFG_Version), 0);
db.Write(WriteOptions.Default, batch);
AddBlockToChain(GenesisBlock);
db.Put(WriteOptions.Default, SliceBuilder.Begin(DataEntryPrefix.CFG_Initialized), true);
}
thread_persistence = new Thread(PersistBlocks);
thread_persistence.Name = "LevelDBBlockchain.PersistBlocks";
thread_persistence.Start();
AppDomain.CurrentDomain.ProcessExit += CurrentDomain_ProcessExit;
}示例4: TestCreatePutDisposeDatabase
public void TestCreatePutDisposeDatabase()
{
using (var db = new DB(new Options { CreateIfMissing = true }, "test1.db"))
{
var saved = db.Put(new WriteOptions { Sync = true }, Slice.FromString("Foo"), Slice.FromString("Bar"));
Assert.IsTrue(saved);
}
}示例5: TestDeleteEntryFromDatabase
public void TestDeleteEntryFromDatabase()
{
using (var db = new DB(new Options { CreateIfMissing = true }, "test1.db"))
{
db.Put(new WriteOptions(), Slice.FromString("Foo"), Slice.FromString("Bar"));
Assert.IsNotNull(db.Get(new ReadOptions(), Slice.FromString("Foo")));
Assert.IsTrue(db.Delete(new WriteOptions(), Slice.FromString("Foo")));
Assert.IsNull(db.Get(new ReadOptions(), Slice.FromString("Foo")));
}
}示例6: Main
static void Main()
{
var l = new Logger(s => Console.WriteLine(s));
var x = new Options
{
CreateIfMissing = true,
RestartInterval = 13,
MaxOpenFiles = 100,
InfoLog = l
};
var db = new DB(x, @"C:\Temp\A");
db.Put("hello", "world");
var world = db.Get("hello");
Console.WriteLine(world);
for (var j = 0; j < 5; j++)
{
var r = new Random(0);
var data = "";
for (int i = 0; i < 1024; i++)
{
data += 'a' + r.Next(26);
}
for (int i = 0; i < 5*1024; i++)
{
db.Put(string.Format("row{0}", i), data);
}
Thread.Sleep(100);
}
Console.WriteLine();
//using(var logger = new Logger(Console.WriteLine))
//{
// Console.WriteLine("hello");
//}
db.Dispose();
GC.KeepAlive(l);
}示例7: TestCRUD
public void TestCRUD()
{
var path = CleanTestDB();
using (var db = new DB(path, new Options { CreateIfMissing = true }))
{
db.Put("Tampa", "green");
db.Put("London", "red");
db.Put("New York", "blue");
Assert.AreEqual(db.Get("Tampa"), "green");
Assert.AreEqual(db.Get("London"), "red");
Assert.AreEqual(db.Get("New York"), "blue");
db.Delete("New York");
Assert.IsNull(db.Get("New York"));
db.Delete("New York");
}
}示例8: Main
public static void Main(string[] args)
{
using (var database = new DB("mytestdb", new Options() { CreateIfMissing = true, BloomFilter = new BloomFilterPolicy(10) }))
{
database.Put("key1", "value1");
Assert.AreEqual("value1", database.Get("key1"));
Assert.IsTrue(database.Get("key1") != null);
database.Delete("key1");
Assert.IsFalse(database.Get("key1") != null);
Assert.IsNull(database.Get("key1"));
}
}示例9: PreloadData
private static void PreloadData()
{
if (Directory.Exists(path))
Directory.Delete(path, true);
var options = new Options();
options.CreateIfMissing = true;
var leveldb = new DB(options, path);
var id = Guid.NewGuid().ToString();
string rowkey = "bob";
leveldb.Put("/users", "table");
leveldb.Put("/users/index/column0", "index");
leveldb.Put("/users/index/column49", "index");
for (int i = 0; i < rows; i++)
{
leveldb.Put(string.Format("/users/{0}", i), "row");
for (int x = 0; x < columns; x++)
{
leveldb.Put(string.Format("/users/{0}:column{1}", i, x), "bob" + i);
leveldb.Put(string.Format("/users/index/column{0}:{1}", x, "bob" + i),
string.Format("/users/{0}", i));
}
}
leveldb.Dispose();
Console.WriteLine(
"Rows created: " + string.Format("{0:N}", rows) +
" Columns per row: " + columns +
" Total keys in DB: " + string.Format("{0:N}", rows * columns));
}示例10: TestReadFromSnapshotOfDatabase
public void TestReadFromSnapshotOfDatabase()
{
using (var db = new DB(new Options { CreateIfMissing = true }, "test1.db"))
{
db.Put(new WriteOptions(), Slice.FromString("Foo"), Slice.FromString("Bar"));
using (var snapshot = db.GetSnapshot())
{
var opts = new ReadOptions{ Snapshot = snapshot };
Assert.IsNotNull(db.Get(opts, Slice.FromString("Foo")));
Assert.IsTrue(db.Delete(new WriteOptions(), Slice.FromString("Foo")));
Assert.IsNotNull(db.Get(opts, Slice.FromString("Foo")));
}
}
}示例11: Cache
public void Cache()
{
Database.Dispose();
// open the DB with a cache that is not owned by LevelDB, then
// close DB and then free the cache
var options = new Options() {
BlockCache = new Cache(64)
};
Database = new DB(options, DatabasePath);
options = null;
GC.Collect();
Database.Put("key1", "value1");
Database.Dispose();
GC.Collect();
}示例12: LevelDBBlockchain
public LevelDBBlockchain(string path)
{
header_index.Add(GenesisBlock.Hash);
Version version;
Slice value;
db = DB.Open(path, new Options { CreateIfMissing = true });
if (db.TryGet(ReadOptions.Default, SliceBuilder.Begin(DataEntryPrefix.CFG_Version), out value) && Version.TryParse(value.ToString(), out version) && version >= Version.Parse("0.4"))
{
ReadOptions options = new ReadOptions { FillCache = false };
value = db.Get(options, SliceBuilder.Begin(DataEntryPrefix.SYS_CurrentBlock));
this.current_block_hash = new UInt256(value.ToArray().Take(32).ToArray());
this.current_block_height = BitConverter.ToUInt32(value.ToArray(), 32);
foreach (Block header in db.Find(options, SliceBuilder.Begin(DataEntryPrefix.DATA_HeaderList), (k, v) =>
{
using (MemoryStream ms = new MemoryStream(v.ToArray(), false))
using (BinaryReader r = new BinaryReader(ms))
{
return new
{
Index = BitConverter.ToUInt32(k.ToArray(), 1),
Headers = r.ReadSerializableArray<Block>()
};
}
}).OrderBy(p => p.Index).SelectMany(p => p.Headers).ToArray())
{
if (header.Hash != GenesisBlock.Hash)
{
header_chain.Add(header.Hash, header, header.PrevBlock);
header_index.Add(header.Hash);
}
stored_header_count++;
}
if (stored_header_count == 0)
{
Dictionary<UInt256, Block> table = db.Find(options, SliceBuilder.Begin(DataEntryPrefix.DATA_Block), (k, v) => Block.FromTrimmedData(v.ToArray(), 0)).ToDictionary(p => p.PrevBlock);
for (UInt256 hash = GenesisBlock.Hash; hash != current_block_hash;)
{
Block header = table[hash];
header_chain.Add(header.Hash, header, header.PrevBlock);
header_index.Add(header.Hash);
hash = header.Hash;
}
}
else if (current_block_height >= stored_header_count)
{
List<Block> list = new List<Block>();
for (UInt256 hash = current_block_hash; hash != header_index[(int)stored_header_count - 1];)
{
Block header = Block.FromTrimmedData(db.Get(options, SliceBuilder.Begin(DataEntryPrefix.DATA_Block).Add(hash)).ToArray(), 0);
list.Add(header);
header_index.Insert((int)stored_header_count, hash);
hash = header.PrevBlock;
}
for (int i = list.Count - 1; i >= 0; i--)
{
header_chain.Add(list[i].Hash, list[i], list[i].PrevBlock);
}
}
this.current_header_hash = header_index[header_index.Count - 1];
}
else
{
WriteBatch batch = new WriteBatch();
ReadOptions options = new ReadOptions { FillCache = false };
using (Iterator it = db.NewIterator(options))
{
for (it.SeekToFirst(); it.Valid(); it.Next())
{
batch.Delete(it.Key());
}
}
db.Write(WriteOptions.Default, batch);
Persist(GenesisBlock);
db.Put(WriteOptions.Default, SliceBuilder.Begin(DataEntryPrefix.CFG_Version), Assembly.GetExecutingAssembly().GetName().Version.ToString());
}
thread_persistence = new Thread(PersistBlocks);
thread_persistence.Name = "LevelDBBlockchain.PersistBlocks";
thread_persistence.Start();
AppDomain.CurrentDomain.ProcessExit += CurrentDomain_ProcessExit;
}示例13: WriteRangeInTask
private static Task WriteRangeInTask(string dbName, int offset, int limit)
{
return Task.Run(() =>
{
var writeOpts = new WriteOptions();
using (var db = new DB(new Options { CreateIfMissing = true }, dbName))
{
for (int i = offset; i < limit; i++)
{
db.Put(writeOpts, Slice.FromString($"key::{i,20:D20}"), Slice.FromString($"{i,32}"));
}
}
});
}示例14: TestEnumerable
public void TestEnumerable()
{
var path = CleanTestDB();
using (var db = new DB(path, new Options { CreateIfMissing = true }))
{
db.Put("Tampa", "green");
db.Put("London", "red");
db.Put("New York", "blue");
var expected = new[] { "London", "New York", "Tampa" };
var actual = from kv in db as IEnumerable<KeyValuePair<string, string>>
select kv.Key;
CollectionAssert.AreEqual(expected, actual.ToArray());
}
}示例15: TestGetProperty
public void TestGetProperty()
{
var path = CleanTestDB();
using (var db = new DB(path, new Options { CreateIfMissing = true }))
{
var r = new Random(0);
var data = "";
for (var i = 0; i < 1024; i++)
{
data += 'a' + r.Next(26);
}
for (int i = 0; i < 5 * 1024; i++)
{
db.Put(string.Format("row{0}", i), data);
}
var stats = db.PropertyValue("leveldb.stats");
Assert.IsNotNull(stats);
Assert.IsTrue(stats.Contains("Compactions"));
}
}